Patents by Inventor Eiji Murase

Eiji Murase has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10808642
    Abstract: A fuel injection control device includes a valve closing detection unit (54) to detect a valve closing timing by using either of an electromotive force quantity detection mode and a timing detection mode, a selection unit (21) to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, and a correction unit (21) to calculate a correction coefficient for correcting a requested injection quantity so as to reduce the difference between an estimated injection quantity and the requested injection quantity, and the selection unit selects the electromotive force quantity detection mode regardless of the value of the requested injection quantity when the calculation of the correction coefficient is not completed.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: October 20, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki Satake, Eiji Murase, Tomohiro Nakano
  • Patent number: 10697384
    Abstract: During a catalyst rapid warm-up at a time of a cold start of an engine, a fuel is injected by a required injection quantity through a multi-stage injection consisting of a fuel injection by a full lift injection during an intake stroke and a fuel injection by a partial lift injection during a compression stroke. In a case where a deterioration of a combustion state is confirmed, a correction for increasing the required injection quantity, which is to enrich an air-fuel ratio, is performed. At a time of the enriching quantity increase, a sum of injection quantities of the multi-stage injection is increased by the amount of the correction for increasing the required injection quantity without the injection quantity and an injection timing of the fuel injection by the partial lift injection being changed from a base time.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: June 30, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko Higuchi, Tomohiro Nakano, Eiji Murase
  • Patent number: 10683826
    Abstract: A fuel injection control device includes a valve closing detection unit to detect a valve closing timing by using either of an electromotive force quantity detection mode and an timing detection mode and a selection unit to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, and the selection unit: selects the timing detection mode when a requested injection quantity is larger than a prescribed reference injection quantity in partial lift injection; and selects the electromotive force quantity detection mode when the requested injection quantity is smaller than the reference injection quantity.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: June 16, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki Satake, Eiji Murase, Tomohiro Nakano
  • Patent number: 10612480
    Abstract: A fuel injection control device includes a correction unit to calculate a correction coefficient for correcting a valve closing timing detected by an electromotive force quantity detection mode by using a valve closing timing detected by a timing detection mode. An estimation unit estimates an estimated injection quantity by using a valve closing timing after corrected by using a correction coefficient when the electromotive force quantity detection mode is selected by a selection unit and a valve closing timing is detected by the electromotive force quantity detection mode.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: April 7, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki Satake, Eiji Murase, Tomohiro Nakano
  • Patent number: 10590880
    Abstract: After start-up of an internal combustion engine, a CPU divides a request injection amount, which is used to control the air-fuel ratio to a target value, into an amount of fuel injected by a port injection valve and an amount of fuel injected by a direct injection valve based on rotation speed and a load ratio. When the amount of fuel injected by the port injection valve changes from zero to greater than zero, the CPU decreases the actual fuel injection amount from the divided fuel injection amount then gradually increases to the divided fuel injection amount. When the amount of fuel injected by the port injection valve is gradually increased, the amount of fuel injected by the direct injection valve is increased from the divided fuel injection amount so that the request injection amount of fuel is injected by the port injection valve and the direct injection valve.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: March 17, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko Higuchi, Tomohiro Nakano, Eiji Murase
  • Patent number: 10589387
    Abstract: An Au—Sn—Ag-based solder alloy for high temperature use containing Sn, Ag, Au and elements that are inevitably contained owing to manufacture procedure, wherein the Au—Sn—Ag-based solder alloy has a composition adjusted so that a solidus temperature is within a range of 280 to 400° C. with a gap between the solidus temperature and the liquidus temperature being within 40° C. The Au—Ag—Sn-based solder alloy has low cost, and is excellent in solderability, reflow wettability and reliability. The excellent reflow wettability of the Au—Ag—Sn-based solder alloy allows it to be useful in reflow bonding of crystal quartz devices, SAW filters and MEMS.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: March 17, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroaki Nagata, Eiji Murase, Toshikazu Shimizu
  • Patent number: 10550793
    Abstract: A fuel injection control device divides an amount of fuel corresponding to an injection amount required for a single combustion into portions corresponding to multiple fuel injections, causes the direct injector to inject the fuel in the multiple times, and causes the direct injector to execute a partial-lift injection as a final fuel injection. The device includes a total injection amount calculation section, an individual injection amount calculation section, and an injection amount changing section. The injection amount changing section executes, as a first changing process, a process for increasing the injection amount at the final fuel injection to a value between a partial-lift injection lower limit value and a partial-lift injection upper limit value and reducing the injection amount at a fuel injection other than the final fuel injection by the increased amount of the injection amount at the final fuel injection.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko Higuchi, Tomohiro Nakano, Eiji Murase
  • Publication number: 20190178189
    Abstract: A fuel injection control device includes a valve closing detection unit (54) to detect a valve closing timing by using either of an electromotive force quantity detection mode and a timing detection mode, a selection unit (21) to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, and a correction unit (21) to calculate a correction coefficient for correcting a requested injection quantity so as to reduce the difference between an estimated injection quantity and the requested injection quantity, and the selection unit selects the electromotive force quantity detection mode regardless of the value of the requested injection quantity when the calculation of the correction coefficient is not completed.
    Type: Application
    Filed: April 7, 2017
    Publication date: June 13, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki SATAKE, Eiji MURASE, Tomohiro NAKANO
  • Publication number: 20190170075
    Abstract: A fuel injection control device includes a correction unit to calculate a correction coefficient for correcting a valve closing timing detected by an electromotive force quantity detection mode by using a valve closing timing detected by a timing detection mode. An estimation unit estimates an estimated injection quantity by using a valve closing timing after corrected by using a correction coefficient when the electromotive force quantity detection mode is selected by a selection unit and a valve closing timing is detected by the electromotive force quantity detection mode.
    Type: Application
    Filed: April 7, 2017
    Publication date: June 6, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki SATAKE, Eiji MURASE, Tomohiro NAKANO
  • Publication number: 20190136789
    Abstract: A fuel injection control device includes a valve closing detection unit to detect a valve closing timing by using either of an electromotive force quantity detection mode and an timing detection mode and a selection unit to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, and the selection unit: selects the timing detection mode when a requested injection quantity is larger than a prescribed reference injection quantity in partial lift injection; and selects the electromotive force quantity detection mode when the requested injection quantity is smaller than the reference injection quantity.
    Type: Application
    Filed: April 7, 2017
    Publication date: May 9, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki SATAKE, Eiji MURASE, Tomohiro NAKANO
  • Patent number: 10240553
    Abstract: This fuel injection system includes a port injector, an in-cylinder injector, and a control device. The control device sets the number of executions of maximum partial lift injection per injection stroke based on the pressure of a fuel supplied to the in-cylinder injector and within a range of the number of injections in which an injection amount of the maximum partial lift injection per injection stroke becomes equal to or less than a target amount. This control device allows the in-cylinder injector to execute the number of executions of the maximum partial lift injection and allows the port injector to inject the fuel by the amount equal to the shortfall compared to the total injection amount only in the maximum partial lift injection by the in-cylinder injector.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: March 26, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Nakano, Eiji Murase
  • Patent number: 10156199
    Abstract: A drive control circuitry and an electronic control circuitry for controlling energization of a plurality of fuel injection valves. The plurality of fuel injection valves including a second fuel injection valve currently injecting fuel and a first fuel injection valve which, of the plurality of fuel injection valves, was last energized before the second fuel injection valve. When an energization start interval between a start of energization of the first fuel injection valve and a start of energization of the second fuel injection valve is longer than or equal to a peak reaching time of the first fuel injection valve, an energization time of the second fuel injection valve is extended as the energization start interval reduces. When the energization start interval is shorter than the peak reaching time, the energization time of the second fuel injection valve is reduced as the energization start interval reduces.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: December 18, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Nakano, Eiji Murase, Rihito Kaneko, Masanao Idogawa
  • Publication number: 20180326543
    Abstract: An Au—Sn—Ag-based solder alloy for high temperature use containing Sn, Ag, Au and elements that are inevitably contained owing to manufacture procedure, wherein the Au—Sn—Ag-based solder alloy has a composition adjusted so that a solidus temperature is within a range of 280 to 400° C. with a gap between the solidus temperature and the liquidus temperature being within 40° C. The Au—Ag—Sn-based solder alloy has low cost, and is excellent in solderability, reflow wettability and reliability. The excellent reflow wettability of the Au—Ag—Sn-based solder alloy allows it to be useful in reflow bonding of crystal quartz devices, SAW filters and MEMS.
    Type: Application
    Filed: August 27, 2015
    Publication date: November 15, 2018
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Hiroaki NAGATA, Eiji MURASE, Toshikazu SHIMIZU
  • Publication number: 20180313291
    Abstract: After start-up of an internal combustion engine, a CPU divides a request injection amount, which is used to control the air-fuel ratio to a target value, into an amount of fuel injected by a port injection valve and an amount of fuel injected by a direct injection valve based on rotation speed and a load ratio. When the amount of fuel injected by the port injection valve changes from zero to greater than zero, the CPU decreases the actual fuel injection amount from the divided fuel injection amount then gradually increases to the divided fuel injection amount. When the amount of fuel injected by the port injection valve is gradually increased, the amount of fuel injected by the direct injection valve is increased from the divided fuel injection amount so that the request injection amount of fuel is injected by the port injection valve and the direct injection valve.
    Type: Application
    Filed: April 17, 2018
    Publication date: November 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko Higuchi, Tomohiro Nakano, Eiji Murase
  • Publication number: 20180221995
    Abstract: Provided is an Au-based solder alloy that has high bonding reliability even when its Au content is lower than that of a conventional Au-based solder alloy. The Au-based solder alloy is used for sealing or bonding a ceramic electronic component and made of an Au—Sn—Ag alloy containing 21.1 to 43.0% by mass of Sn, 0.1 to 15% by mass of Ag, and a balance of Au and inevitable impurities, an Au—Ge—Sn alloy containing 9.5 to 15% by mass of Ge, 2 to 10% by mass of Sn, and a balance of Au and inevitable impurities, or an Au—Ag—Ge alloy containing 5 to 18% by mass of Ag, 7 to 20% by mass of Ge, and a balance of Au and inevitable impurities. When the Au-based soldering ball is crushed in one direction, a maximum stress before cracking occurs is 2.0×102 N/mm2 or more, and a square root of strain before the cracking occurs is 0.40 or more.
    Type: Application
    Filed: March 25, 2016
    Publication date: August 9, 2018
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventor: Eiji MURASE
  • Patent number: 9938924
    Abstract: A control device for a fuel injection valve includes a drive circuit that controls open/close operation of the fuel injection valve by passing an exciting current through a solenoid of the fuel injection valve and an ECU that reduces a peak current value as a fuel pressure in a delivery pipe at timing of a start of energization of the fuel injection valve decreases. The ECU reduces the peak current value as an amount of fuel discharged from a high-pressure fuel pump to the delivery pipe reduces.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: April 10, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Nakano, Eiji Murase, Rihito Kaneko
  • Patent number: 9926879
    Abstract: An electronic control unit that calculates an injection standby period, which is a period from an energization start point of the solenoid to a point at which the fuel injection valve opens, and adjusts an energization period of the solenoid in accordance with the calculated injection standby period. The electronic control unit of the control apparatus for a fuel injection valve then measures a reference fall detection period, which is a period from the energization start point to a reference fall detection point, and sets the injection standby period to be longer as the reference fall detection period is longer. Here, the reference fall detection point is a point at which the excitation current detected by the current detection circuit falls below a reference current value, which is smaller than a peak current value, while the excitation current decreases after reaching the peak current value.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: March 27, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Nakano, Eiji Murase, Rihito Kaneko
  • Publication number: 20180030919
    Abstract: A fuel injection control device divides an amount of fuel corresponding to an injection amount required for a single combustion into portions corresponding to multiple fuel injections, causes the direct injector to inject the fuel in the multiple times, and causes the direct injector to execute a partial-lift injection as a final fuel injection. The device includes a total injection amount calculation section, an individual injection amount calculation section, and an injection amount changing section. The injection amount changing section executes, as a first changing process, a process for increasing the injection amount at the final fuel injection to a value between a partial-lift injection lower limit value and a partial-lift injection upper limit value and reducing the injection amount at a fuel injection other than the final fuel injection by the increased amount of the injection amount at the final fuel injection.
    Type: Application
    Filed: June 29, 2017
    Publication date: February 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko HIGUCHI, Tomohiro NAKANO, Eiji MURASE
  • Patent number: 9810172
    Abstract: An objective of the present invention is to stabilize the fuel injection amount for each cylinder and to execute fuel injection control accurately in a single-pressure-feed dual-injection type alcohol fuel injection system. An engine includes two injection valves and and a single-pressure-feed dual-injection type fuel supply system. The fuel supply system is configured such that fuel is injected sequentially in two cylinders during the pressure-feed-interval period from the execution of one fuel pressure-feed operation to the execution of the next fuel pressure-feed operation. If the alcohol concentration in the fuel is higher than a predetermined determination value ? at a startup operation time, an ECU executes only a cylinder injection for the first of the two cylinders described above, and executes both an intake passage injection and a cylinder injection for the second cylinder.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: November 7, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi Mitani, Eiji Murase, Takahiro Tsukagoshi, Kazuhisa Matsuda
  • Patent number: 9765722
    Abstract: A fuel injection system for an engine, the fuel injection system includes injectors and an electronic control unit. The injectors include needle valves; and the ECU is configured to: (i) execute partial lift injection and full lift injection with the injectors, the partial lift injection being injection during which the needle valve does not reach a fully-open state and the full lift injection being injection during which the needle valve reaches the fully-open state; (ii) operate the engine in a partial lift injection region where the injection of a required injection amount of a fuel is shared by the partial lift injection and the full lift injection; and (iii) perform the amount of correction of the required injection amount with respect to the injection amount shared by the full lift injection when the required injection amount is corrected while the engine is operated in the partial lift injection region.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: September 19, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiko Higuchi, Tomohiro Nakano, Rihito Kaneko, Eiji Murase